Patent
1995-05-05
1997-04-08
Kriess, Kevin A.
G06F 944
Patent
active
056196989
ABSTRACT:
The present invention discloses a variety of methods and apparatus for providing patches within a computer operating system. A patch structure in accordance with one embodiment of the present invention includes a patch block which serves to link the patch structure into a patch chain, and a patch which contains the desired functionality of the patch structure. The patch chain includes a root patch structure and a final patch structure. The root patch structure has a root patch block and a given function which has the root functionality. One aspect of the present invention teaches a method for integrating patches into a computer operating system including the steps of obtaining a new patch to be associated with a patch chain for the given function, determining whether a patch chain is already created in the operating system for the given function and creating a root patch block pointing to the given function as the start of a new patch chain if a patch chain has not already been created for the given function, creating a new patch block for the new patch, and inserting data into the new patch block to cause the new patch block to point to the new patch.
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"Inside Macintosh: PowerPC System Software," Apple Computer, Inc., 1994, Addison-Wesley Publishing Company.
Cobb Jeffrey R.
Eidt Erik L.
Lillich Alan W.
Meretsky Wayne N.
Apple Computer Inc.
Chavis John Q.
Kriess Kevin A.
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